Court of Appeals for the Fourth Circuit March 6, 1963, 8639_1 (Thomas W. Nicholson v. Carl W. Mullis Engineering and Manufacturing Company, Inc.)

ALBERT V. BRYAN, Circuit Judge.

Log barking machines are the subject of the three patents now before us in the review of the District Court’s determination : (1) that the two owned by plaintiff-appellant Nicholson are invalid, (2) that the one belonging to defendant-appellees Mullís is valid, and (3) that the latter has been infringed by an unpat-ented machine of the appellant.